دورية أكاديمية
Measurement of the Positron to Electron Ratio in the Cosmic Rays above 5 GeV
| العنوان: | Measurement of the Positron to Electron Ratio in the Cosmic Rays above 5 GeV |
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| المؤلفون: | Golden RL, Stochaj SJ, Stephens SA, Aversa F, Barbiellini G, Boezio M, Bravar U, Colavita A, Fratnik F, Schiavon P, Vacchi A, Zampa N, Mitchell JW, Ormes JF, Streitmatter RE, Bellotti R, Cafagna F, Castellano, Marcello, Circella M, DeCataldo G, DeMarzo C, GIGLIETTO, Nicola, Marangelli B, Raino A, Spinelli P, Bocciolini M, Finetti N, Papini P, Perego A, Piccardi S, Spillantini P, Basini G, Brancaccio FM, Ricci M, Brunetti MT, Codino A, Grimani C, Menichelli M, Bidoli V, Candusso M, Casolino M, DePascale MP, Morselli A, Picozza P, Sparvoli R, Hof M, Menn W, Simon M. |
| المساهمون: | Golden, Rl, Stochaj, Sj, Stephens, Sa, Aversa, F, Barbiellini, G, Boezio, M, Bravar, U, Colavita, A, Fratnik, F, Schiavon, P, Vacchi, A, Zampa, N, Mitchell, Jw, Ormes, Jf, Streitmatter, Re, Bellotti, R, Cafagna, F, Castellano, Marcello, Circella, M, Decataldo, G, Demarzo, C, Giglietto, Nicola, Marangelli, B, Raino, A, Spinelli, P, Bocciolini, M, Finetti, N, Papini, P, Perego, A, Piccardi, S, Spillantini, P, Basini, G, Brancaccio, Fm, Ricci, M, Brunetti, Mt, Codino, A, Grimani, C, Menichelli, M, Bidoli, V, Candusso, M, Casolino, M, Depascale, Mp, Morselli, A, Picozza, P, Sparvoli, R, Hof, M, Menn, W, Simon, M. |
| سنة النشر: | 1996 |
| المجموعة: | Politecnico di Bari: Iris POLIBA (Catalogo dei prodotti della Ricerca) |
| مصطلحات موضوعية: | Cosmic ray, Elementary particles |
| الوصف: | As part of a series of experiments to search for antimatter in cosmic rays, the New Mexico State University balloon-borne magnet spectrometer was configured for a flight to study positrons. Two completely new instruments, a transition radiation detector and a silicon-tungsten imaging calorimeter, were added to the magnet spectrometer. These two detectors provided a proton rejection factor better than 3 x 10(4). This instrument was flown from Fort Sumner, New Mexico, at an average depth of 4.5 g cm(-2) of residual atmosphere for a period of 25 hr. We report here the measured fraction of positrons e(+)/(e(+) + e(-)) from similar to 5 to 60 GeV at the top of the atmosphere. Our measurements do not show any compelling evidence for an increase in this ratio with energy, and our results are consistent with a constant fraction of 0.078 +/- 0.016 over the entire energy region |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | STAMPA |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/wos/WOS:A1996TQ54800013; volume:457; issue:2; firstpage:103; lastpage:106; numberofpages:4; journal:THE ASTROPHYSICAL JOURNAL; http://hdl.handle.net/11589/1082Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-15444367727 |
| DOI: | 10.1086/309896 |
| الإتاحة: | https://doi.org/10.1086/309896Test http://hdl.handle.net/11589/1082Test |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.AB3D5C08 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1086/309896 |
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